Division of Gastroenterology;
Department of Internal Medicine;
Keimyung University School of Medicine;
Division of Gastroenterology;
Department of Internal Medicine;
Pusan National University School of Medicine;
Division of Gastroenterology;
Department of Internal Medicine;
Yeungnam University College of Medicine;
Division of Gastroenterology;
Department of Internal Medicine;
Catholic University of Daegu School of Medicine;
Division of Gastroenterology;
Department of Internal Medicine;
Kyungpook National University School of Medicine;
Division of Gastroenterology;
Department of Internal Medicine;
Dongguk University School of Medicine;
Division of Gastroenterology;
Department of Internal Medicine;
Inje University College of Medicine;
Division of Gastroenterology;
Department of Internal Medicine;
Dong-A University Medical Center;
Division of Gastroenterology;
Department of Internal Medicine;
Kosin University College of Medicine;
Division of Gastroenterology;
Department of Internal Medicine;
Gyeongsang National University School of Medicine;